White cement isn't a separate type of cement like Portland cement. It's actually just Portland cement with a very low iron oxide content. This low iron oxide content is what gives white cement its distinctive color.
Why is Iron Oxide Important?
Iron oxide is a natural component of most cement raw materials. It's what gives typical gray cement its color. When iron oxide is present in high concentrations, it creates a darker gray color.
How is White Cement Made?
To make white cement, manufacturers carefully select raw materials with extremely low iron oxide content. These materials are then processed and ground in a similar way to traditional gray cement.
Why is White Cement Used?
White cement is used for various applications where its unique properties are advantageous:
- High Reflectance: The white color reflects light, making it ideal for creating bright and airy spaces, especially in areas with limited natural light.
- Aesthetic Appeal: White cement is used in decorative applications like sculptures, fountains, and architectural elements, adding a clean and elegant touch.
- Blending with Pigments: White cement provides a blank canvas for blending with various pigments, allowing for a wide range of colors and finishes.
- Mortar and Grout: White cement is used in mortars and grouts where its whiteness helps to minimize discoloration.
What are the Differences between White Cement and Gray Cement?
While both white and gray cement are made from the same basic ingredients, there are some key differences:
- Color: White cement is white due to its low iron oxide content, while gray cement has a darker color due to the presence of iron oxide.
- Strength: White cement typically has slightly lower compressive strength than gray cement, but this can vary depending on the specific formulation.
- Cost: White cement is usually more expensive than gray cement due to the higher cost of raw materials and processing.
Conclusion:
White cement is a versatile material that offers unique advantages for specific applications. Understanding how it is made and its properties can help you choose the right cement for your project.
